Mack Trucks has identified that certain truck models may have been assembled with incorrect center bearing...
Mack technical service bulletin S4579 092025 for 2026 Mack Anthem (An), 2026 Mack Granite (GR) and 2026 Mack Pinnacle (Pi/PN).
- Bulletin number
- S4579 092025
- Component
- Unknown or other
- Summary
- Mack Trucks has identified that certain truck models may have been assembled with incorrect center bearing mounting hardware and could have been torqued incorrectly. Improper torque can increase the risk of hardware failure. To address this issue, please follow the instructions in this document to replace and correctly torque the center bearing and center bearing mounting bracket hardware.
Vehicles covered
- Mack Anthem (An) 2026 2026
- Mack Granite (GR) 2026 2026
- Mack Pinnacle (Pi/PN) 2026 2026
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